I have electric underfloor heating and I used Avatto ZW100 thermostats for this heating. I have 2 installations. In one, I use a room and floor temperature sensor, in the other, only a room temperature sensor. The problem is with thermostats that only use a room sensor.
What happens is that when I turn on the heating, the temperature automatically drops very quickly and after a relatively long time it starts to rise. For example, from 20 it drops to 16 and then starts to rise, the thermostat turns off when it reaches 20 degrees, but the room is overheated, for example 25. As you can see on the graph, after turning off the temperature continues to rise for some time (it seems to me that it is a call that “loss” at the beginning).
Has anyone encountered this? Unfortunately, I cannot connect floor sensors to them, and since it is possible to choose one, the other or both sensors in the settings, I didn’t even think that it would cause such problems.
In the attachment, I am sending a graph of what it looks like when the heating is turned on.
It doesn’t make sense to me either. But as you can see on the graph, the temperature drops when the heating is turned on. I’m an electrician and I’m not that stupid. There is nothing to change there. Either it heats or it doesn’t. The heating is switched on, as it should be, only on the thermostat, instead of stagnating and then increasing the temperature, the temperature drops pointlessly. Such a thermostat is of no use to me, because as I wrote, it turns off at the wrong temperature, i.e. at 20, but in reality it is already 25 in the room.
Chart from today. You can see a decrease when switching on, then a slow rise and then a rapid rise in temperature again after switching off. I don’t understand…
It’s probably not the fault of the thermostat, because all of them (5 pcs) that we have at home do it.
I have first version, Electric Floo Heating without sensor.
I’m using it over HA without a Tuya zigbee gateway. I don’t see this option in the zigbee settings - NC and NO.
Even if I had it turned on in any way, the main problem is that the temperature drops on its own. It’s heating, it can’t cool. And even if it didn’t melt, the temperature can’t drop.
The only way I see this could happen is that you’d have another thermostat acting on the heating, and that interverting NC/NO would actually turn the heating off.
Little update. When a connected external sensor and selected both in setting, then temperature was OK. So, problem is in FW. But I couldn’t find how to update FW or what version is in it.
